桥链七甲川菁的合成及光性能

菁是一种具有多功能用途的染料,除用作卤化银感光材料及有机光导材料的光谱增感剂、光记录材料中记录介质外,还可作为染料激光器中用的激光染料.我们曾合成了四甲川苯乙烯菁、五甲川(艹粦)及五甲川吡喃鎓等红外染料作为激光染料,测定了它们的光性能.本文合成了具有桥链的七甲川菁,研究了这些桥链七甲川菁的吸收光谱及荧光光谱,并以YAG激光倍频(532nm)作泵浦源,测定了它们的激光调谐范围、中心波长及激光转换效率.     

羟基取代对称恶碳菁染料的合成

菁染料作为在近紫外至近红外区域内的光谱增感剂,其主敏化区受到分子结构中的次乙基链长度和不同杂环结构的影响。     

吲哚菁染料的研究进展

吲哚菁染料以其特有的结构, 已成为在光谱增感、光盘存储、生物分析、太阳能电池等方面应用广泛的染料品种之一. 综述了十五年来吲哚菁染料的合成进展, 对其应用现状作了简要介绍.     

噻菁染料的合成

本实验合成了6个二磺酸盐的水溶性噻菁染料，并通过UV-vis、^1H NMR、IR谱图和元素分析给予确定。从紫外可见光谱可看出，苯环上的取代基影响染料的最大吸收(λ~m~a~x)和摩尔消光系数ε~m~a~x。     

不对称感绿增感染料的研究进展

在卤化银乳剂中加人一种染料,能赋予乳剂对染料所吸收的光谱部分以感光性。这种染料称为光谱增感染料。光谱增感剂尤如卤化银乳剂的眼睛,使它能看到五彩七色。即能使卤化银乳剂的感光范围从蓝紫光区扩展到绿、红、甚至红外光区。可制得感应蓝紫光、绿光的正色片,感应全部可见光的全色片,以及能感应红外光的红外片。     

短波长菁染料对氯化银乳剂的光谱增感作用

本文利用紫外 可见吸收光谱、光谱曝光等手段研究了5种短波长菁染料,比较了它们在氯化银乳剂上的光谱增感作用,得出3种较好的短波长增感染料,并研究它们在氯化银颗粒上的吸附行为.结果表明,这3种染料在氯化银颗粒上均有吸附,并能有效地提高氯化银乳剂在短波长区的感光度.     

N—苄基吲哚三碳菁染料的合成及性能

合成了５种Ｎ－苄基吲哚三碳菁染料，通过红外光谱、核磁共振氢谱及元素分析确证了其结构，并研究了电子吸收光谱、荧光光谱、光稳定性及溶解度。结果表明，染料溶液和膜的最大吸收波长均为７８０￣８３０ｎｍ；染料在二氯乙烷中的溶解度大于在乙醇中的溶解度；氮原子上苄基的吲入极大地改变了染料的光稳定性（与ＨＩＴＣＩ比较）。     

浅谈菁染料及其研究前景

主要介绍菁染料的结构、性质和光谱增感过程的机理,探求增感染料未来的发展方向。     

不同溶剂对方块菁染料(SQ-3)LB膜吸收及荧光光谱的影响

利用荧光光谱、紫外可见吸收光谱研究了方块菁染料在不同极性的溶剂中的光谱性质的变化,并利用LB膜技术、Brewster角显微镜及荧光光谱、紫外可见吸收光谱研究了不同极性的铺展溶剂对染料的铺展形态及制备的LB膜样品的光谱性能的影响,说明了分子组装在形成功能薄膜中的重要性.     

含喹啉环端基不对称三甲川菁的合成与性能

含喹啉环端基不对称三甲川菁的合成与性能姚祖光，陈峡华，张清华（华东理工大学精细化工研究所，上海，２００２３７）关键词菁，电子吸收光谱，光稳定性，光谱增感菁染料是一种卤化银乳剂的有效光谱增感剂［１］，近年来随着光源的变化，特别是半导体激光器的研制成功，...     

Syntheses and absorption-structure relationships of some new photosensitizer cyanine dyes

New biheterocyclic compound was synthesized as starting material to prepare new photosensitizers mono-, tri-, substituted tri-, azadimethine and mixed cyanine dyes. Absorption-structure relationship of the synthesized cyanine dyes were determined by studying their electronic spectral behaviour in ethanol. The structure of the compounds were identified by elemental analysis, IR and¹HNMR spectral data.     

增感染料与卤化银微晶之间的作用及其聚集态的研究

本文研究了光谱增感染料的结构对立方体卤化银乳剂的感光性能的影响,并利用反射光谱和彩色分析荧光电镜研究了染料在卤化银微晶上的聚集态和Ｊ 聚集体的相对尺寸,通过测定乳剂离子电导率研究了染料的结构对乳剂离子电导率的影响．实验结果表明：本文中所用的九个染料不管是增感还是减感染料都能在立方体卤化银乳剂上形成Ｊ 聚集态;对噻碳菁染料而言,其５位上无论是吸电子基团还是推电子基团的染料形成的Ｊ 聚集体的平均尺寸皆较未取代染料的大,其增感效果也较好;苯环５位上吸电子基取代或平面性好的噻碳菁染料可提高立方体ＡｇＢｒＩ乳剂的离子电导率,证明它们的增感效果也好;６位硝基取代的吲哚碳菁染料是典型的减感染料,其在立方体乳剂上所形成的Ｊ 聚集体较小,但是对乳剂的离子电导无影响．此外,本文还试图对不对称插烯菁染料Ｄｙｅ９使立方体ＡｇＢｒＩ乳剂减感的作用进行了解释     

Synthesis and Spectral Behaviour of Some New Uninuclear Pyrimidine 2[2(4)]‐Mono(Tri)‐Methine Cyanine Dyes

New unsymmetrical 2[2(4)]‐mono‐and tri (substituted tri)‐methine cyanine dyes incorporating 1,2,5,6‐tetrahydro‐4,6‐diaryl pyrimidine (pyrimidinium‐1‐yl salt)‐2‐one were prepared. Structural determination was carried out by elemental analysis, IR and ¹H NMR spectral data. The spectral behaviour of all the synthesized cyanines was examined in 95% ethanol.     

Blue‐to‐Orange Color‐Tunable Laser Emission from Tailored Boron‐Dipyrromethene Dyes

A series of meso‐substituted boron‐bipyrromethene (BODIPY) dyes are synthesized and their laser and photophysical properties systematically studied. Laser emission covering a wide visible spectral region (from blue to orange) is obtained by just changing the electron donor character of the heteroatom at position 8. The additional presence of methyl groups at positions 3 and 5 results in dyes with a photostability similar to that of the unsubstituted dye but with much improved efficiency. Correlation of the lasing properties of the different dyes to their photophysical properties provides inklings to define synthetic strategies of new BODIPY dyes with enhanced efficiency and modulated wavelength emission over the visible spectral region.     

Synthesis and spectral-generational characteristics of pentamethylidynecyanine dyes from 1-methyl-3-arylbenzo[f]quinolinium salts

Pentamethylidynecyanine dyes were synthesized by the reaction of 1-methyl-3-(R-phenyl)benzo[f]quinolinium quarternary salts with 1,3,3-triethoxy-1-propene, Pentamethylidynecyanines substituted in the meso position of the polymethine chain were obtained by condensation of these salts with 1-anilino-2-methyl-3-dimethoxy-1-propene hydrobromide. The spectral and generational characteristics of the dyes were determined. It was shown that the presence of a phenyl group in the benzo-[f]quinoline ring of the dyes gives rise to a bathochromic shift of the absorption and generation maxima. The investigated dyes have high generation efficiencies that lie in the 20–30% range and in the 940–1010 nm spectral range.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1523–1527, November, 1982.     

Synthesis and Visible Spectral Behaviour of Some New N‐Bridgehead Heterocyclic Cyanine Dyes Incorporating Pyrazolo (4,5‐b) Indolizine (Benzoindolizine)

The new unsymmetrical N‐bridgehead, apo (zeromethine), mono‐methine, dimethine, meso substituted tetramethine and styryl cyanine dyes incorporating pyrazolo (4,5‐b) indolizine (benzoindolizine) nuclei were prepared. Structural confirmation was carried out by elemental analyses, IR, H‐NMR, mass spectra and ¹³C‐NMR with the aid of carbon DEPT spectral data. The visible absorption spectra for the newly synthesized cyanines were examined in 95% ethanol.     

Sensitization of nanocrystalline TiO2 with black absorbers based on Os and Ru polypyridine complexes

New metal complexes of the type [M(H3tcterpy)LY]+ (where M = Os(II) or Ru(II), L = substituted or unsubstituted bipyridine or pyridylquinoline, and Y = Cl-, I-, or SCN-) have been designed, synthesized, and characterized in view of their application for dye-sensitized solar cells (DSSCs). The Os dyes show a very broad absorption, and correspondingly, the DSSCs show an unprecedented spectral response in the NIR, with an onset at 1100 nm, reaching values of about 50% at 900 nm. The integrated photocurrent of some of such Os dyes is similar to that of the well-known [Ru(Htcterpy)(NCS)3](TBA) and superior to that of the [Ru(Hdcbpy)2(NCS)2](TBA)2 sensitizer. The Ru dyes show absorption and DSSC spectral response between those of the red and black dyes. Their advantage is their potential superior stability due to the reversible oxidative electrochemistry.     

Synthesis and spectral characterization of some new azo dyes and their metal complexes

A series of azo-metal chelate dyes have been synthesized by coupling substituted o-nitroaniline and p-t-/s-butylphenol. The spectral characterization of the azo dyes containing o-hydroxy group and azo-metal(II) chelate [metal(II): Cu, Ni, Co] dyes by IR spectra, UV–VIS spectra, NMR spectra, elemental analysis and magnetic susceptibility techniques are reported. The stoichiometry of the azo-metal chelates was determined by the spectroscopic titration method to be 1:2 (ML₂).     

蒽醌衍生物在不同酸度溶液中的吸收光谱

蒽醌类化合物是一类古老的染料,对光和热非常稳定.某些蒽醌化合物还具有稳定的非晶态和晶态结构,在一定条件下可以进行相互转换,这种材料对强光具有非线性,有潜在的应用背景^[1].为此我们设计合成了两种新的蒽醌类化合物,测试了它们在溶液中的吸收光谱,研究了溶液酸碱性对吸收光谱的影响.     

新型中位取代七甲川菁染料的合成及光稳定性研究

本文合成了两种新型中位取代近红外七甲川菁染料,采用核磁1 HN-MR和HRMS质谱对其结构进行了表征.并测试了染料在不同溶剂中的吸收光谱和荧光发射光谱性质.染料3b、3c在甲醇中的最大吸收波长和最大荧光发射波长分别为677/790nm和647/786nm,斯托克斯位移分别为113 nm、139nm.经过光降解实验测试得到3种染料3a—3c在乙醇中的光降解速率常数分别为1.21×10-3 mol/min、1.81×10-3 mol/min和2.14×10-3 mol/min.循环伏安法测得染料3a—3c的氧化电位分别在0.729V、0.624V和0.598V.光降解实验表明:七甲川菁染料中位亚甲基链上吸电基取代增强染料光稳定性,供电基取代减弱染料的光稳定性;供-吸电子能力强弱决定了染料的光稳定性强弱;同时中位氯原子取代与共轭链上的氢键作用有利于染料的稳定性增强,中位氮原子取代无法形成很好的氢键作用,不利于染料稳定性的提高.